the category of Tithi for Auspicious time selection
reactor
Descripción: Piston orchestration
Design of Expansion Joint for PSC continuous type superstructureFull description
Design of Plate type heat exchanger.
Inverted based welding machineFull description
Design of Plate type heat exchanger.
Ring type foundation for large aboveground storage tanksDescripción completa
Design of Plate type heat exchanger.
This is a sample of a columnar type of lesson plans I made during my internship in a local public school somewhere in Metro Manila. It is a non-formal type of lesson plan used by public scho…Full description
Full description
Descripción completa
arabic type evolution
Name of the work:- B.T.to the Road from DPN Road at 36/2 to Suradavanipeta Est.Cost:-Rs.529.21 lakhs Grant:- PMGSY Ph-VI
DESIGN OF CAUSEWAY I)Design Aspects&Specifications Aspects&Specifications a)Hydralic Aspects: i)The i)The Maximum design discharge is calculated based on both Catchment area method (By using Dicken's formula and Ryve's formula) and Area-Velocity method taking cross-sections of stream at as per IRC:SP 13. ii)No ii)No vertical clearence clearence is necessary iii)As iii)As the mean velocity of flow is less than 2.6m/sec,protection of entry and exit ends is not necessary unless otherwise required based on scour depth calculations. iv)Scour iv)Scour depth calculations were done based on IRC: SP 13 and raft foundations are proposed for box culvert with cut-off walls and launching approns.
b)Foundation Concrete: i)The i)The bearing capacity of the soil is taken as 10t/m2,because clayey soil is met with upto 4.0m depth below LBL. ii)Hence ii)Hence raft foundation is proposed at 2.00m depth.Cut-off walls and launching aprons are designed and proposed as per IRC 89-1985
g)Weep holes&Water spouts: i)In i)In abutments, abutments,Weep holes are provided above G.L @ 100mm c/c both horizontal and vertical directions in staggered manner with 1 in 20 slope to the retaining face with 100mm AC pipes of Cl-15. ii) GI drainage spouts are provided @ 2 Nos per one deck,each at about 2.65m from the decking edge. h)Back filling in between head walls: i)Back i)Back filling inn between head walls is provided with granular material consisting of 75% gravel and 25% sand for full depth depth for the entire length.
l)Approches: i)Approaches i)Approaches are proposed with side earth consolidated to OMC.
Assistant Exe.Engineer PR,Ichapuram
Dy.Exe. Engineer PR,Kotabommali
Executive Engineer PR,Srikakulam
DESIGN OF VENTED CAUSE WAY Hydraulic Data:Parameter Catchment area(As plotted from Topo sheets)
Data
Unit 98.6 Sq Sq.Km
Bed width of defined Cross-Section
305 Metre
Bank width of defined cross-section
365 Metre
HFL
98.89 Metre
LBL(Lowest Bed Level)
96.09 Metre
Discharge by Dicken's Formula
406.77 Cumec
Discharge by Area-Velocity Method
1272.64 Cumec
Protected Bed Level
99.48 Metre
RTL(Road Top Level)
98.34 Metre
Annual Rain fall
1360 mm
1)Area Velocity method:At the proposed causeway site:Maximum Flood level
Design of Vents:I) Provide vent area 30% of area on defined cross-section of RTL Bed Widthx(RTL-LBL)x30/100 Widthx(RTL-LBL)x30/100 = 205.88Sqm ii) a) 2.3m vent rectangular box culverts-----5 Nos b) 1000mm dia pipes
No.of pipes required
Vent Area=
26.45Sqm
= Vent Area/Area of pipe =
228.36 Say
iii) However Provide
228Nos
70Nos of vents only to accommodate in the bed width
Calculation of area on defined cross-section at RTL--- 98.135m Chainage GL
81.43Sqm Area between road top and top of protected bed 372.48Sqm Area of defined cross-section corresponding to protected bed top 622.6Sqm
Let the width of the wall at bottom be ' b2 ' 1/2Ka r h2
Active Earth pressure Pa = =
31.66KN/m
It acts horizontally at a height of h/3 from the base(Since there is no inclined surcharge and the face of the wall is vertical) The Wt.of the wall acting down wards through the the centroid of the wall section section ' W ' =
14.63 14.63 +33b2 +33b2
Let ' R ' be the resultant of the above forces acting through the intersection of the above forces with components RH and RV For no tension to develop,the resultant should pass through the middle third of t he base, taking limiting case, R should act at 2b2/3 from heel ' B ' From the condition of equilibrium of forces, RH = Pa RV = W and Sum of moments of ' W ' and ' Pa ' about " B " should be equal to the moment of resultant ' R ' about about ' B' R X 2b /3
W Xb /2 + W [b +(b -b )/3]
P Xh/3
Hence eccentricity ' e ' =
0.22
W/b2(1+6e/b2)
Maximum stress = =
71.49 < 120KN/M2(Safe Bearing Capacity as per the testing report)
Hence Safe
Design of Raised Face walls:Data:0
Angle of internal friction ' Q ' = Unit Wieght of Soil ' r ' = Coefficient of Active Earth pressure ' K a ' =
30
Unit Weight of concrete ' p ' = Height of wall ' h ' = Width of wall at Top ' b1 ' =
20KN/cum 1.70m
18KN/cum 1/3
0.45m
Design:Let the width of the wall at bottom be ' b2 ' 1/2Ka r h2
Active Earth pressure Pa = =
8.66KN/m
Hence b2 =
1.20m
Check For Safety Against Sliding:-
Wt.of the wall ' W ' =
28.05KN/m
Factor of safety against sliding is given by F =WTan Q/P a 1.87 1.87 > 1.00 1.00
Hence Safe
Check For Stresses:Taking moments about ' B ' 28.05a = Hence ' a '
=
17.28 0.62
Hence eccentricity ' e ' =
0.02
W/b2(1+6e/b2)
Maximum stress = =
25.23 < 120KN/M2(Safe Bearing Capacity as per the testing report)
DESIGN OF CUT-OFF WALLS FOR BOX CULVERT Name of the work:-B.T to the Road from DPN Road@36/2 to Suradavanipeta
Hydraulic details of CHINNA GEDDA :1.Maximum Flood Level
98.89m
2.Ordinary Flood level
97.89m
3.Lowest Bed level
96.09m
4.Average bed slope
0.0005
5.Rugosity Coefficient
0.03
6.Road Crest level
98.335m
7.Bottom of Deck level(For Box culvert only)
98.105m
8.Width of carriage way 9.Ryve's Constant 10.Dicken's Constant 11.Catchment area of the tank
Soil Particulars obtained from Trial bores drilled:-
5.00m 6.80 13.00 98.60Sq.Km
Maximum Flood level Slope Rugosity Coefficient S.No
LONGITUDINAL SECTION OF THE CAUSEWAY NOTE:- 70 Nos of 1000mm dia NP3 pipes&1 No of 5 span 2.3m vent continuous RCC box culvert are proposed.But all the details could not be shown due to limitation of space
U/S
D/S 5.0m
Guide posts
'0.45
C.C(1:2:4) C.C(1:4:8) 1000mm dia NP3 Pipe Sand Filling (0.30m thick)
Granular filling
Toe wall 0.45
G.L
2.0m
2.0m 0.6m
C.C(1:4:8) 2.00m 0.15m
Apron 600mm to 300mm thick Apron--900mm thick 2.15m
